a Before 2002, Other
major fuels includes
liquefied petroleum gas, methanol, ethanol, and bunker fuel. From 2002 to
2009, Other major fuels includes liquefied petroleum gas, methanol,
ethanol, bunker fuel, kerosene, and grain additive.

b Power includes electric propulsion and electric battery.

NOTES

Data
from 1996 and after are not comparable to the data for earlier years or to
the data published in previous editions of the report due to different data
sources used.

Data
from 1996 and after are for those vehicles used for directly operated (DO)
services only .

Energy consumed, total does not include the other types of energy
identified in table 17 in the National
Transit Database due to the
lack of information on the unit of
measurement for such data before 2008.

The
following conversion rates were used:

Diesel
=138,700 Btu/gallon.

Compressed
natural gas = 22,500 Btu/gallon.

Bio-Diesel
= 126,200 Btu/gallon.

Liquefied
natural gas = 84,800 Btu/gallon.

Gasoline
= 125,000 Btu/gallon

Liquefied
petroleum gas = 91,300 Btu/gallon.

Methanol
= 64,600 Btu/gallon.

Ethanol
= 84,600 Btu/gallon.

Bunker
fuel = 149,700 Btu/gallon.

Kerosene
= 135,000 Btu/gallon.

Grain
additive = 120,900 Btu/gallon.

Electricity
1KWH = 3,412 Btu, negating electrical system losses. This table includes
approximate electrical system losses, and thus the conversion factor is
multiplied by 3.

1996-2009:
U.S. Department of Transportation, Federal Transit Administration, National Transit Database, tables 17, 19, and similar tables in
earlier editions, available at http://www.ntdprogram.gov/ntdprogram/data.htm as of Dec. 20, 2010.